Objective:To compare the effect of PFNA-Ⅱ and Hemiarthroplasty for the treatment of unstable intertrochanteric fractures of patients aged more than 70 years old.Method:From September 2011 to March 2013,fifty six cases over 70 years old with unstable intertrochanteric fractures were included and divided to 2 groups randomly,received PFNA-Ⅱfixation and hemiarthroplasty respectively.These cases were followed up in 12 months.The postoperative complications and postoperative long-term effect are analyzed and com...